src/test/run-pass/mir_cross_crate.rs

// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

// compile-flags: -Z orbit
// Tests that -Z orbit affects functions from other crates.

#![feature(unsafe_no_drop_flag)]

#[unsafe_no_drop_flag]
struct Foo;

impl Drop for Foo {
    fn drop(&mut self) {
        panic!("MIR trans is not enabled for mem::forget");
    }
}

fn main() {
    let x = Foo;
    std::mem::forget(x);
}